Swimwear · Easy
Swim trunks sewing pattern
Athletic swim trunks.
Choose your size
Each size has its own page with the full pattern, the cutting list and the measurements used.
Pattern preview
Sewing instructions
General steps to sew this garment. Seam allowance is 1 cm (3/8") unless stated otherwise.
Supplies
- Swim elastic and swim lycra
- Waist elastic and drawstring
- Matching thread and the right needle
- Print the pattern at 100%, check the test square and cut the pieces following the cutting list. Transfer notches, darts and button marks.
- Cut with the greatest stretch running horizontally (around the body). Use pattern weights instead of pins so the knit does not distort.
- Sew the outseams, then the inseams of each leg.
- Put one leg inside the other, right sides together, and sew the crotch seam in one go, matching the inseams.
- Close the waistband into a loop, enclose the elastic and sew it to the waist while stretching.
- Fold up the hems (sleeves and body) and stitch with a twin needle or zigzag so they keep their stretch.
Cutting list
| Piece | Cut | Material |
|---|---|---|
| Back | 2× | Main fabric |
| Front | 2× | Main fabric |
| Waistband | 1× | Main fabric |
Measurements needed
| Measurement | How to measure |
|---|---|
| Hip circumference | Around the hips, at the level of the hip bones. |
| Thigh circumference | Around the top of the thigh. |
| Waist to thigh | Along the side, from the waist to the thigh line. |
| Waist to hips | Along the side, from the waist to the hip line. |
FAQ
Is the swim trunks pattern really free?
Yes. Every Kutopy pattern is free, with no sign-up and no watermarks. You can sew and sell what you make.
Which measurements do I need?
This pattern uses 4 body measurements. If you don't know them, pick a standard size or follow our measuring guide.
Does it include seam allowance?
Yes, it includes 1 cm (3/8") seam allowance (outer dashed line). You can remove it in the editor.
How do I print it at full scale?
In the editor pick your paper and tap "Download PDF". At home: numbered Letter or A4 pages you tape together. At a print shop or plotter: full size on one sheet, a 36" roll or large sheets. Always print at 100% and check the 10 × 5 cm test square.
